G94 Table Spirometry results at 1 year of age
EPI n  =  49TC n  =  3895% CI of difference (EPI-TC)
Male, n (%)49 (47%)38 (42%)−16% to 25%
Gestation, weeks25.7 (1.0)39.7 (1.1)−14.5 to −13.5
Age at test, weeks51.1 (8.1)48.3 (9.0)−0.9 to 6.5
FVC Z-score−1.3 (1.3)0.0 (1.3)−1.8 to −0.7***
FEF25–75% Z-score−3.3 (1.8)−1.5 (1.1)−2.5 to −1.2***
FEV0.5 Z-score−2.6 (2.0)−0.7 (1.4)−2.6 to −1.2***
  • Results are expressed as mean (SD) unless stated.

  • ***p<0.001.

  • EPI, extremely preterm infants; FEF25–75%, forced expiratory flow in the mid range; FEV0.5, forced expiratory volume in 0.5 s; FVC, forced vital capacity; TC, healthy term controls.